Senior Systems Engineer; MBSE & Digital Engineering) IRES - SSFB​/HSV​/FBEL

As a Senior Systems Engineer (MBSE & Digital Engineering) supporting the Next Generation Environment (NGE) on the Integrated Research and Development for Enterprise Solutions (IRES) contract, you will serve as a core technical contributor driving the digital engineering transformation for the Missile Defense Agency's (MDA) unified digital environment.

In this role, you will apply Model-Based Systems Engineering (MBSE) methodologies and digital engineering practices to architect, decompose, and trace complex system requirements across hybrid cloud, enterprise networks, cybersecurity, and platform domains. You will bridge the gap between operational requirements, systems architecture, and technical implementation by developing authoritative SysML models, defining system interfaces, and integrating DoD cybersecurity standards (RMF, DISA STIGs, and Zero Trust) directly into the model baseline.

Working collaboratively across multi-contractor consortium performers, engineering domain leads, and Government technical directors, you will ensure the NGE digital foundation maintains full traceability, technical rigor, and mission-aligned verification from concept through operational deployment.

• Develop, refine, and maintain comprehensive MBSE models, system architectures, and behavioral/structural diagrams (e.g., Use Case, Block Definition, Internal Block, Activity, Sequence, and State Machine diagrams) utilizing SysML modeling tools such as Cameo Systems Modeler / Magic Draw.
• Ensure all systems engineering artifacts adhere to established International Council on Systems Engineering (INCOSE) and Object Management Group (OMG) standards.

• Decompose top-level MDA mission and stakeholder requirements into detailed functional, performance, interface, and cybersecurity specifications.
• Establish and maintain "golden thread" requirements traceability from high-level capabilities down to system baselines, subsystems, and verification criteria, ensuring no orphaned requirements or unverified technical debt.

• Incorporate Risk Management Framework (RMF) controls, DISA Security Technical Implementation Guides (STIGs), and DoD Zero Trust principles directly into MBSE architecture models.
• Serve as a technical bridge between systems engineering and cyber defense teams, ensuring that system boundaries, security overlays, and identity/access management (ICAM) controls are accurately represented in technical baselines.

• Define and document system-to-system and component-to-component interfaces, generating authoritative Interface Control Documents (ICDs), system design specifications, and architecture decision records.
• Ensure physical, logical, and virtual infrastructure dependencies (compute, storage, VMware virtualization, operating systems, and network overlays) are synchronized with the MBSE digital thread.

• Develop and maintain Verification Cross-Reference Matrices (VCRMs), system validation plans, and technical evaluation criteria to support formal Systems Engineering Technical Reviews (SETRs).
• Coordinate with test teams to validate that implemented infrastructure and platform…